Home / 20,747.07-28,621.70-12,786.39

Finding the Fourth Proportional to 20,747.07, 28,621.70 and 12,786.39

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Solution

The fourth proportional to 20,747.07, 28,621.70 and 12,786.39 is: 17,639.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.07 : 28,621.70 = 12,786.39 : x
  2. Step 2: Convert to fraction form
    20,747.07/28,621.70 = 12,786.39/x
  3. Step 3: Cross multiply
    20,747.07x = 28,621.70 × 12,786.39
  4. Step 4: Simplify right side
    20,747.07x = 365,968,154.73
  5. Step 5: Solve for x
    x = 365,968,154.73/20,747.07
  6. Step 6: Final answer
    x = 17,639.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.